The U-boats that were in the Narvik area at the end of the war were all moved to the Skjomenfjord upon Allied orders to avoid conflicts with the Norwegians on 12 May. On 15 May, a German convoy of five ships (the fleet tender Grille with the staff of FdU Norwegen aboard, the fleet oiler Kärnten, the repair ship Kamerun and the depot ships Huascaran and Stella Polaris) and 15 U-boats (U-278, U-294, U-295, U-312, U-313, U-318, U-363, U-427, U-481, U-668, U-716, U-968, U-992, U-997 and U-1165) left for transfer to Trondheim, but was intercepted after two days by the 9th Escort Group off the Norwegian coast and officially capitulated. While the ships were allowed to proceed to Trondheim, the U-boats were escorted to Loch Eriboll, Scotland, arriving on 19 May. All U-boats were later that month transferred to Lisahally or Loch Ryan for Operation Deadlight.

Attacks on this boat and other events

3 May 194403.32 hrs, Norwegian Sea: U-278 was surprised by three carrier aircraft (one Swordfish of 842 Sqn FAA from HMS Fencer and one Swordfish and one Martlet of 833 Sqn FAA from HMS Activity) in the vicinity of convoy RA 59. It happened so quickly that the AA gunners only returned fire after the initial attack, but they then managed to keep the aircraft at a distance with the quadruple flak gun for 20 minutes until the boat dived. The four or five depth charges dropped fell wide and the boat suffered only superficial damage from 33 hits to the conning tower and the upper deck from the strafing runs. The Germans observed AA hits on the right wing of the Martlet and claimed it shot down after observing it trailing smoke until lost from sight. However, all three aircraft returned to their carriers.

1 recorded attack on this boat.

Schnorchel-fitted U-boat

This boat was fitted with a Schnorchel underwater-breathing apparatus in October 1944.